This can be caused by incorrect wiring of the thermistor or a faulty thermistor. Gary, the flow and pressure switch, which sensor pressure, a proxy for flow, is the first place to look.Make sure the pump is pushing as much water as possible, into the heater. Save my name, email, and website in this browser for the next time I comment. The LED on the back panel indicated HLS. However, your heater will show the exhaust temp. Ignition Failure 2. Hello Hi,e repl This problem needs to be fixed ASAP. There are two. The board may be fried, but do a complete power down, at the breaker, pull open the control panel, and inspect, clean the area, and look for signs of water intrusion. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? Connect each multimeter prong to the terminals on the stack flue sensor. The sensor is operating if the resistance is 3.5 ohm or above. Take off your Pentair pool heaters left side panel. $4100 is not cheap. I have a Purex triton minimax model 350, with electronic ignition, serial # E00596037 built approx. If the filter isnt the issue, a faulty safety switch is next to check. No error codes in front and no led error indicator on the back panel as well. Hi Davy I live in Maine, so very short pool season. The airflow switch is factory set and attached to the ignition module. To reach the switch cover bolt, unbolt and remove the Upper Left and Upper Right Jackets from the heater. Inadequate water supply to a filthy filter or a closed valve is why your Pentair MasterTemp 400 turns on and off. So be careful while tasting the transformers voltage. Now, we make a living selling to DIY people, who like to save money. Bad Control Board FAQs: When the condenser coil on your heat pump gets unclean, it needs to work more to provide equal amounts of heating as normal. It means your stack flue sensor has tripped. Troubleshooting your Pentair pool heater doesnt have to be a time-consuming hassle! We will do our best to help. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. And the exchanger out of the flue discharges the exhaust gas. Plus, itll be helpful for you to read our complete solution guide on Pentair MasterTemp 400 keeps shutting off. Is there a bypass valve open? I replaced the HLS twice to no avail. Note: You can also read how to fix Pentair MasterTemp 400 common problems. Your Pentair MasterTemp 400 wont stay lit? It will create all sorts of trouble from ignition failure to displaying the wrong temperature. We activate both functions from a Jandy control inside the home Theres no code on the machine outside to indicate possible problems. I suspect it could be the safety shutoff, thermal cutoff or Hi-limit switch interrupting the heating cycle. Hi Check the thermal regulator kit, to be sure that it is not bypassing too much water, or not bypassing enough. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. Sounds like a ghost in the machine! There are some common temperature issues that users face. www.pentairpool.com. How do I check the exhaust temperature on my Pentair Mastertemp? Wet Heater 6. So, was going to need to be replaced at some point. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. Description: New Smart MasterTemp 400 Ignition Control Module, NA/LP. If not, replace it. In short the system keeps automatically turning the temp up on its own. http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf. Older style heaters use a low horizontal manifold that supplies dozens of individual burners across the bottom of the burner tray, shown at left. The solution to your heater issue is given in your previous comment. Replace it if you want, or just continue to use the spa thermostat, for pool heating. Step 3: To test, look for resistance across the HSI scale. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Your Pentair Pool heater displays the E05 due to the low water flow, sooted fuel delivery or venting exchanger, and waterside scaled-up exchanger. Make sure that the pilot is lit (millivolt heaters). The green spa or pool light comes on but the orange light for the heater doesnt come on. Pentair Mastertemp 400 Heater Not Turning On. Turn on the resistance testing mode on a multimeter. First, you need to check on the wiring connection of the thermistor. Same issue continues. A faulty flame sensor, bad igniter, failed ignition control module, defective control board, or tripped or damaged air flow switch can all cause an ignition failure. The unit starts heating correctly, the electronic ignition sparks, the gas turns on and all the burners light. It is always better to be safe than sorry. Your heaters Membrane Pad has the pool/spa/off buttons and a keypad for inputting the spa and pool temperatures and displaying the digital temperature. Ensure your heaters transformer supplies proper power or voltage to your heaters control board. Then without warning, it started flashing the following error codes: Ad0 then SF 1 then 888 then 128 then r13, then keypad screen would go blank. The thermal regulator is located between your heaters inlet and outlet fittings, behind the Inlet/Outlet Manifolds threaded plug. I connected my old termistor and got a reading of 85 degrees. Look at the blower if you hear a clicking sound. Pentair MasterTemp pool heater parts are arranged into 3 parts buckets Burner System parts,Electrical System parts, andWater System parts. Your heater stops working or blowing when a lower volt or no volt comes to the control panel out of the transformer. Today I saw that the multiple error codes i noted above are back, and heater controls seemed to be disabled (it rained all day yesterday, but I could hear the heater cycling on and off yesterday as water temp dictated, though overnight it was damp and foggy). Pentair MasterTemp 400 Common Problems [15 Easy Fixes] 1. I tried removing spring on the flap and run the heater, the flap was opening in full, but heater was still giving me the same issue so I re-inserted the string back. Learn more about pool care and repair. Still have the power light lit but no other lights are lit. Continue with Recommended Cookies. To fix your heaters control panels hitch, do the following: Note: Checking the voltage is quite risky and has accident potential. It does heat the spa about 1 degree every cycle. Step 1: Take off the left side panel of the heater. I think its a bit on the high side. Pentair Mastertemp 400 keeps shutting off, Pentair MasterTemp 400 display not working, Pentair MasterTemp 400 blower not working, Torpedo Heater Keeps Shutting Off [9 Easy Fixes], Comfort Zone Heater Not Working [7 Easy Fixes], complete solution guide on Pentair MasterTemp 400 keeps shutting off, Richmond Tankless Water Heater Code 29 [Reasons + Solutions], Richmond Tankless Water Heater Code 13 [Reasons + Solutions], Richmond Tankless Water Heater Code 11 [Why+ How To Fix], Richmond Tankless Water Heater Code 12 [Why+ How To Fix], How To Adjust Temperature On Richmond Water Heater [Made Easy]. Verify that the igniter is dry and not damaged physically. You are pressing your Pentair Mastertemp 400 heater Pool and Spa button. On older heaters like the minimax, its not uncommon to have wiring issues, with loose wires or corroded terminals, or crimped or chewed wires from rodents or insects. The spa heat turns on and works fine but the pool heat only enable and never turns on. Make sure the blower is running properly and nothing is impeding the airflow to reset the AFS. When replacing the ICM, connect the wires according to the installation manual. Without a working control panel, your heater is no good. Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor help to ensure optimal heater performance. Pentair Mastertemp 400 Wont Turn On [10 Troubleshooting Tips], 2. Change the faulty igniter and the bad ignition module. Display Not Working 5. Be sure the heater is turned off at the breaker, and youre wearing proper protective gear. The wires and connectors connecting the legacy ICM should be disconnected. When it used to work I would hear a big kaboom sound and now nothing. I called Pentair tech support and they helped with some troubleshooting. If no ignition, I turn off, wait, then re ask for heater. Then checks the continuity across the sensor. My heater also powers up, displays lights, without anyone touching it. Remove the Max-E-Therm Heater from the equation. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. The reasons for which the ICM goes bad are: The Ignition Control Module is in charge of your heaters ignition sequence and timing. Although, theres strong water coming out of the 2 return lines. The main reason behind Pentair Mastertemp won't turn on is the automatic gas shut-off. To get to the burner inside the heater, open it up. Any ideas on what the problem could be? The sealed heat exchanger surrounds the burner flame holder. Do you have a picture of the Fenwal? Reduce strength of exhaust vent and/or number of elbows. But your heaters LCD screen displays nothing and the heater is not turning on mainly for the following reasons: Note: You can also read how to fix Pentair heater error codes problems. Troubleshooting Guides; Product Manuals; POPULAR . If needed. Examine the area for any clogs or impediments. Replace the defective parts. Check for wet or damaged igniter with low resistance to ground. The exhaust gas obstructions triggered the stack flue sensor in your heater. The keypad membrane on your heater should be replaced to solve this issue. Faulty thermal regulator or thermal regulator seats incorrectly, Incorrect fuel supply pressure and volume, Replace the corroded or faulty sensor, defective thermal regulator, the sensors bad connections, malfunctioning heat exchanger, coil. Why does my Pentair heater keep turning off? 400: 40 (152) 120 (454) . Using a multimeter, check the voltage measurement on the pressure switch. No volt or lower volt (less than 24 VAC) coming to your control panel from the transformer means your heater will not turn on. Might charge under $500 to install. They said the 126 display was an error code. Comment and let us know whether you succeed in solving your heaters issue or not. David is a man who loves doing research and finding out the best solution to any type of heating appliance issues like heaters and fireplaces. Along with the fluctuation the heater cycles. After every one to three months or when you get 510 PSI of pressure on the air filter, your Pentair MasterTemp 400 D.E. Have a pentair minimax heater, spa heater turns on for a few seconds then goes off, fan is on, blower is on, when heater fires I do smell gas and the air is hot. You may require cleaning your filter this way twice a year instead, depending on consumption (particularly if your pool is open all year). Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. Dont stress! Look for any evidence of cracking on the flame sensor porcelain. Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. I shouldve tried harder to learn how the pool works. . Step 2: Disconnect the system from the Max-E-Therm heater. Did you replace both Hi Limit Switches? You need to take apart the filter cover and get the elements out. Make sure the pilot tube is intact and not clogged. So far I have replaced the thermal regulator, igniter, thermistor and the bypass valve in the manifold. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. Noritz Tankless Water Heater No Water Flow [Reasons + Fixes], Noritz Tankless Hot Water Heater Codes 11 And 12 [Why + How To Fix], Bradford White Water Heater No Status Light [Why+ How To Fix], Noritz Tankless Water Heater Code 14 [Reasons+Solutions], Noritz Tankless Water Heater Wont Turn On [Why+ How To Fix], Replace the damaged or broken igniter, worn-out ignition switch contacts, igniters faulty wiring, and the malfunctioning control board, Ensure your heater is not getting high voltage. Then, replace the faulty heater part or parts. #476223 Pentair MasterTemp 400 Pool Heater, Ignition Module. To check your heaters ICM, remove and open the ICM up and inspect why it goes bad. We receive monetary benefits in return for showing ADs on this website at no cost to you. . All you have to do now is double-check the burner. As your unit is a new one, to fix your pool heater issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer. Low Water Flow 10. So, I opened the 3-port valve and adjusted it where the 2 return lines are fully open. Replace the fuse if blown. I run the heater and this time it did something different. Then i see a R9 code. The wiring diagram is given below for your reference. Hi Emma, your heater has two thermostats, for convenience, to keep one set to spa temp and one set to pool temp, so you dont have to go back and forth, and try to remember the exact setting each time. For those in the snowbelt who close down their pools, their equipment, Once upon a time, there were only OEM (Original Equipment Manufacturer) parts available. Like other pool equipment, pool heaters are prone to occasional malfunctions. Once clean, put the filter back together. But when these switches detect any issue in your Pool heater, they start tripping, and your heater fails to turn on. COPYRIGHT 2023. I just didnt trust them anymore. Step 1: Turn off the filter pump as well as the heaters electrical power. Thanks for your help! If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the . Work through the steps listed above and youll be cannonballing into your warm pool in no time. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. Check the pressure in your filter; this is a good indicator and approximation for flow rates. A clogged filter or pump basket can build resistance to water flow to a degree that your heater cant operate as usual. Replace with new igniter. Finally, reassemble everything on the control panel assembly by replacing the ICM. Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor . This can cause cycling. Clogged Pool Filter 8. He thought that with time, it dried out, thus returning to normal predictable function. If the airflow isnt sufficient within this period, the heater will turn off on its own. Test your control panel with a multimeter. The pump basket blockage or clogged filter causes water flow resistance. Thank you for your time and response. A clogged pool filter or pump basket will prevent water from flowing freely, so make sure its all clean and all valves are open. Replace in case necessary. You might also bring the heat exchanger in for maintenance. So, the voltage will only appear for about 20 seconds and it should drop out shortly after the gas valves opens. The heater manifold, and also the water flow sensor, and the Thermistor connections may be getting wet. Smart connectivity via the Pentair Automation Systems enable you to manage pool functions anytime, anywhere. I have a MasterTemp 200. More about us. Product Details. I replaced the thermistor and still have the same problem. Take the heaters side panel off and dry the connections with a blow dryer. It continuously bounces between pool and spa. The Service Heater light comes on when the heat shuts . Boiling in the heat exchanger can occur for a number of reasons. Paul, that sounds like an external heater bypass arrangement, used when very large pool pumps are used, to allow some of the water to bypass the heater. Pentair 77707-0001 Manifold Bypass Valve . Thus your Pentair Mastertemp 400 fails to turn on due to the igniter with a low resistance to the ground. Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. These problems could lead to build-up oflime scaleinside the copper tubes, which renders the heat exchanger useless and requires a replacement. The thermal regulator should be in fine working condition. This item Pentair 460783 Ignition Control Module Replacement Kit MiniMax NT Pool and Spa Heater Pentair 472447 Digital Module Ignition Control Replacement MiniMax Pool and Spa Heater Swimables 42001-0063S High Limit Switch for All Pentair Mastertemp and Starite Pool Heater - Compatible with All Sta Rite and Pentair Pool Heater Parts Fortunately, you simply need to remove and clean the filter and make sure all the valves are open. Heaterfixlab.com is a participant in Google Adsense and Ezoic Ad Network. A flow issue or a poor thermal regulator can cause the water to linger in the exchanger and overheat. Clean up all the flue sensor orifices to ensure there is no grime on them. Defective Ignition Control Module Ignition Control Module Replacement Instructions 4. Pentair Mastertemp 400 ignition problem. The biggest fear about theheat exchangeris that corrosion can occur to the relatively soft copper finned tubes, causing them to develop pinhole leaks. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Manage Settings If you had a Hayward filter, and it broke,, Pentair Pool Heater Troubleshooting Guide, Must Have Accessories for Above Ground Pools. Also, your heater displays the error code ERR IGN. Could the problem be with the flow or pressure sensors? Whenever he finds the perfect solutions to any issues of heating appliances after doing in-depth research, he loves to share them with his readers. Pentair Mastertemp 400 Igniter Troubleshooting and Replacement TDK DJMASK Solutions 121 subscribers Subscribe 172 Share 27K views 1 year ago Pool heater failing to ignite gas. What else can impact the temp reading? What does a high-limit switch do on a pool heater? Condensation is normal when the water is cold. Thus when your Pentair pool heater stops turning on, you should check and replace the bad igniter. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. Replace the thermistor if the test points towards a defect. Properly clean the sensor, heat exchanger, and coil. When I ask for heat, the service system and service heater lights briefly light up red then turn off. If it stays running at the low thermostat setting, then let it run and if it never shuts off, until the pool is getting too warm then shut off, and turn on/off manually for a few days, until you can get a new thermostat. The ignitor is connected to the Molex connector with wires. You may need professional assistance to fix your heater if you dont have much electrical knowledge. When this happens, the front panel buttons will stop working. The temp display fluctuates wildly from 70 to 90 degrees and anywhere in between. Thus replace the malfunctioning or stuck Membrane Pad, Switch, and switchs damaged or bad wiring. The following instructions will guide you through the entire process of replacing the Ignition Control Module, ICM of your Pentair MasterTemp 400. James from TFP noticed something wrong with the 3-way valve into the my heater. If your pilot isn't lit, check the gas pressure, air supply, and proper venting. If the resistance is zero, the stack flue sensor needs to be replaced. Replace or Repair your Swimming Pool Filter? Improperly Grounded Burner Flame Holder 3. Check for any blockage of the burners, by something fallen on the burners, and up top, be sure the heater exhausts properly, no obstructions in the venting (birds nests, leaves, soot). Fill a jar halfway with 130F water. Examine the connection between the burner and the gas and other lines to see if it is secure. Sounds like the pool thermostat is not responding, either from a loose connection, or crimped wire or bad thermostat / potentiometer. And 290-350 is the normal temperature range. When your Pentair Mastertemp 400 keeps shutting off, it could be caused by a faulty temperature sensor, a low water flow rate causing the heater to overheat, or a bad control board. A defective AGS switch can cause ignition failure. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'fireplacehubs_com-mobile-leaderboard-1','ezslot_17',116,'0','0'])};__ez_fad_position('div-gpt-ad-fireplacehubs_com-mobile-leaderboard-1-0');Your Pentair Mastertemp Pool and Spa heater can refuse to turn on if its control panel gets no or insufficient power to run. Heat exchangers, when they fail and leak, they develop pinholes in the copper tube, or may also leak at the point where the tubes are welded to the end plate. Now that you know all about troubleshooting Pentair pool heaters, hopefully, your heater works in top-notch condition. Is the filter or baskets dirty, or impeller clogged? Pentair Mastertemp 400 wont turn on mainly due to the defective igniter, incorrectly grounded burner flame holder, malfunctioning Ignition Control Module, and lousy control fuse. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. Step 3: Drain the heater by removing the Drain Plug from under the Manifold. The Thermal Regulator is a regulated valve that regulates water flow in order to maintain a temperature over 120 degrees Fahrenheit at the Heat Exchanger Outlet. Is enough water getting into the heater? In case there is blockage in the heat exchanger, how do I fix that? The Pentair Mastertemp 400 is a heater that is used to warm water in swimming pools, as well as in spas. Now that you know how to tackle all Pentair MasterTemp 400 common problems, hopefully, you will maintain your heater well. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. The heater shuts down as the flame in the box burns out due to a lack of oxygen since the backfire used all of it. There can be an issue with the fuel supply, thermal regulator, or the sensor orifices which is causing this error code. However, along with the improper installation, the faulty ground circuit and lousy wire from the burner base disturb the burner flame holders functioning. Membrane switchs damaged or faulty wiring. Heat exchangers can corrode due to pinhole leaks on copper tubes, saltwater, lack of alkalinity, and low pH levels. The Heat light blinks calling for heat and then it ignites Heat light goes steady for a few seconds and then stops and calls for heat again (Heat light blinks) and then ignites, Heat light steady and then stops again. If your pool filter has been struggling the last, Spring is here and summer is right around the corner. Step 2: Remove the nuts that secure the Igniter Bracket. Kindly help. We have a new Pentair Mastertemp 400. Replace everything in its proper location. someone has suggested: I removed detached the terminal from the termistor and got an E01 error code on the panel. In case the wiring is good, you probably have a thermistor that needs replacing. To resolve this error number, ensure the fan is not obstructing airflow. Defective Membrane Switch 8. Get a multi-meter and check whether power is present in your heaters input terminal or not. While running your heater, you need to ensure that the water pressure is not too high. Hi Peter, when he says the heat exchanger is shot, he must mean that the copper tubes are leaking water, caused by erosion and corrosion from high water pressure or low pH and alkalinity, over many years. They will help you out with replacing your control board. Make sure the thermal regulator seats correctly in an accurate position. Normally you can smell a little gas when it kicks on but it does nothing. The typical cost of replacing an ignition control module is $292-$398. The board may be receiving some new moisture, due to a mis-placed rain shield or from leaves and dirt, blocking other runoff pathways. Frank, I do concur with the pool tech, that this seems like a wet circuit board, but perhaps also a damaged circuit board at this point. Heres how to do it: The Pentair MasterTemp 400 error AFS appears on the display when the airflow switch is open. filter. Your heater light may be blinking because of a failed ICM. A defective thermistor can cause an ignition lockout. Troubleshooting the stacked exchanger type of heater is not much different than other electronic or digital pool heaters. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. Step 2: If the heater is below the pools water level, close the isolation valves to prevent the pool from draining. 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